Newark weather in September: Newark, Delaware: normal highs, lows, rain and records for September
Newark in September has a normal high of 79°F and a normal low of 58°F, a daily mean of 69°F, falling from 84°F on the 1st to 75°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 4.87 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 15°C, 124 mm of precipitation in September.
- NOAA stationNewark Agricultural Farm
- Station IDUSC00076410
- Location39.67°N 75.75°W
- Elevation106 ft (32 m)
- From the centerunder 1 mile
- Population30,506
- Jan 43° 25°
- Feb 46° 25°
- Mar 54° 33°
- Apr 67° 42°
- May 76° 52°
- Jun 84° 62°
- Jul 89° 66°
- Aug 87° 65°
- Sep 79° 58°
- Oct 69° 46°
- Nov 57° 36°
- Dec 47° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Newark in September?
The normal high is 79°F and the normal low 58°F, for a daily mean of 68.9°F. September is 6.8°F cooler than August and 11.2°F warmer than October. September is the 4th warmest month of the year in Newark and the wettest. Across the month the normal high falls 9°F, from 84°F on September 1 to 75°F on September 30. From one year to the next September's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 67°F and 71°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 63°F | 26% | 19% |
| September 8 | 82°F | 61°F | 26% | 19% |
| September 15 | 80°F | 59°F | 26% | 19% |
| September 22 | 77°F | 56°F | 27% | 20% |
| September 30 | 75°F | 53°F | 27% | 19% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 84°F | 63°F | 26% | 19% | 13 h 10 min |
| September 2 | 84°F | 62°F | 26% | 19% | 13 h |
| September 3 | 83°F | 62°F | 26% | 19% | 13 h |
| September 4 | 83°F | 62°F | 26% | 19% | 13 h |
| September 5 | 83°F | 62°F | 26% | 19% | 13 h |
| September 6 | 82°F | 61°F | 26% | 19% | 12 h 50 min |
| September 7 | 82°F | 61°F | 26% | 19% | 12 h 50 min |
| September 8 | 82°F | 61°F | 26% | 19% | 12 h 50 min |
| September 9 | 82°F | 61°F | 26% | 19% | 12 h 50 min |
| September 10 | 81°F | 60°F | 26% | 19% | 12 h 40 min |
| September 11 | 81°F | 60°F | 26% | 19% | 12 h 40 min |
| September 12 | 81°F | 60°F | 26% | 19% | 12 h 40 min |
| September 13 | 80°F | 60°F | 26% | 19% | 12 h 40 min |
| September 14 | 80°F | 59°F | 26% | 19% | 12 h 30 min |
| September 15 | 80°F | 59°F | 26% | 19% | 12 h 30 min |
| September 16 | 79°F | 59°F | 27% | 19% | 12 h 30 min |
| September 17 | 79°F | 58°F | 27% | 19% | 12 h 30 min |
| September 18 | 79°F | 58°F | 27% | 19% | 12 h 20 min |
| September 19 | 78°F | 58°F | 27% | 19% | 12 h 20 min |
| September 20 | 78°F | 57°F | 27% | 19% | 12 h 20 min |
| September 21 | 78°F | 57°F | 27% | 20% | 12 h 20 min |
| September 22 | 77°F | 56°F | 27% | 20% | 12 h 10 min |
| September 23 | 77°F | 56°F | 28% | 20% | 12 h 10 min |
| September 24 | 77°F | 56°F | 28% | 20% | 12 h 10 min |
| September 25 | 76°F | 55°F | 28% | 20% | 12 h 10 min |
| September 26 | 76°F | 55°F | 28% | 19% | 12 h |
| September 27 | 76°F | 54°F | 28% | 19% | 12 h |
| September 28 | 75°F | 54°F | 28% | 19% | 12 h |
| September 29 | 75°F | 54°F | 28% | 19% | 11 h 50 min |
| September 30 | 75°F | 53°F | 27% | 19% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 58°FSeptember average
- Precipitation
- 4.87 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 27
- Days at 80°F or more
- 16
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00076410; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Newark in September?
On a given September day the chance of 0.01 inch or more is 27% on average, highest around September 25 (28%). In all, 4.87 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Newark, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00076410.
What are the records for September in Newark?
The warmest September temperature on this station's record (since 1894) is 100°F, on September 3, 1953; the coldest is 31°F, on September 27, 1947. The wettest September brought 12.01 in (1999).
The September mean against the 1991-2020 normal of 68.9°F: 2021 68.5°F (−0.4), 2022 67.3°F (−1.6), 2023 68.6°F (−0.3), 2024 67.3°F (−1.6), 2025 68.8°F (−0.1). 0 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.5°F | −0.4°F | 7.04 in |
| 2022 | 67.3°F | −1.6°F | 3.09 in |
| 2023 | 68.6°F | −0.3°F | 5.25 in |
| 2024 | 67.3°F | −1.6°F | 0.63 in |
| 2025 | 68.8°F | −0.1°F | 2.64 in |
Source: records: ACIS, station USC00076410; recent months: ACIS, station USC00076410. Records and recent months use complete months only.
How does September in Newark compare across Delaware?
Across the 6 places PlainClimate covers in Delaware, September normal highs run from 79°F in Wilmington to 80°F in Lewes; Newark's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.